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� � University of Minnesota Pump Selection Procedure - 10125104 <br /> All boxed rectangles must be entered,the rest wiil be catculated. <br /> OHi1T! <br /> 1. Detertnine pump capacity: T��,`� <br /> A Gravity Distribution P"�"""' <br /> 1.Minimum required discharge is 10 gpm <br /> 2.Ma�dmum suggested discha�ge is 45 gpm � <br /> Fw other establishmenls at le2�st 1096 greater than the water ; <br /> supply rate,but no faster than the rate at which eftluent will flow <br /> out of the distribu6on device. <br /> B. Pressure Distribution-see pressure design woricsheet sol�treatmeni system <br /> &pant of discharge <br /> ................. <br /> :...........:.... <br /> Selected Pump Capacity: �gpm torai�ipe <br /> lengih <br /> Inlet 2A.elevation <br /> 2. Determine Total namic Head DH •� difference <br /> �Y (T ) ac� ,. : <br /> . ss ._ . � <br /> A. Elewahon differenoe behNeen pump and point of discharge. ;, _. ___._ ; <br /> 19 feet ' i --------------------------- ------. <br /> << � , <br /> B. Special head requirement?(See Figure-Special Head Requinements) <br /> �5 feet Special Head Requirements <br /> Gravity Distribution Oft <br /> C. Fric6on loss in supply pipe Pressure Distribution 5ft <br /> 1. Select pipe diameter �in <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(C1} <br /> Read fric6on bss in feet 100 feet from Figure E-9 E-9 Friction Loss in Plastic Pipe <br /> Friction loss= 2.5 ff/100 ft of pipe 100 ft <br /> ' nominal <br /> 3.Determine total pipe length from pump discharge to soil system discha�ge point. Flow Rate i e diameter <br /> Estimate by adding 25 percent to pipe length for friction loss in fittings. m 1.5" 2.0" 3" <br /> Pi len th times 1.25=equivalent pipe length 20 2.47 0.73 0.11 <br /> 281 ft x 1.25= 351.25 feet 25 3.73 1.11 0.16 <br /> 30 5.23 1.55 0.23 <br /> 4.Cak;ulate total friction loss by mul6plying friction loss(C2) 35 6.96 2.06 0.3 <br /> by the equivalent pipe length(C3)and divide by 100. 40 8.91 264 0.39 <br /> Friction Loss= 2.5 ft/100ft X 351.25 ft / 100= 8.8 feet 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> D. Total head requirement is the sum of elevation difference(A),special 55 4.76 0.7 <br /> head requirements(B),and total friction loss(C4). 60 5.6 0.82 <br /> 19 ft + 5 ft + 9.0 ft 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> Total Head: 33.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 36 gpm(1A or 8) <br /> wiTh at least 33.0 feet of total head(2D). <br /> I hereby certify that I have completed this work in accordance with all applicable ordinances,rules and laws. <br /> (signature) 810 (license#) 5/18l07 (Date) <br /> Page 1 of 1 <br />